[3A01-07] Topical symposium

9:30 AM - 10:00 AM JST(12:30 AM - 1:00 AM UTC)

[3A02【依頼講演】] Tuning selectivity in CO₂ electroreduction through catalyst and electrode surface design

*Kazuyuki Iwase¹ (1. Tohoku University (Japan))

Electrochemical CO₂ reduction on gas diffusion electrodes is governed not only by catalyst properties but also by catalyst-layer structures and electrolysis conditions. Our machine-learning analysis showed that electrode preparation parameters, including catalyst loading, strongly influence product selectivity, indicating the importance of rational electrode design. Based on this concept, we used direct sputtering as a method for preparing controlled catalyst layers on gas diffusion electrodes. The sputtered electrodes enabled systematic investigation of how catalyst-layer formation and atomic-scale catalyst structures affect CO₂ reduction selectivity. These studies show that multiscale electrode design, from catalyst deposition to surface atomic arrangement, is essential for controlling reaction pathways in CO₂ electroreduction.

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